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Editorial Team
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Asked: 2026-06-08T00:18:31+00:00

I work on Mac OSX Lion and ever since I’ve installed the Zend Debugger

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I work on Mac OSX Lion and ever since I’ve installed the Zend Debugger and gotten it to be able to debug php web applications, I often encounter this Eclipse startup error:

Error creation extension for extension-point
org.eclipse.php.internal.debug.daemon.communication Plug-in
org.eclipse.php.debug.core was unable to load class
org.eclipse.php.internal.debug.core.zend.communication.DebuggerCommunicationDaemon.
An error occurred while automatically activating bundle
org.eclipse.php.debug.core (258).

The error log contains the following stack trace:

org.eclipse.debug.core.DebugException: Plug-in org.eclipse.php.debug.core was unable to load class org.eclipse.php.internal.debug.core.model.PHPConditionalBreakpoint.  
at org.eclipse.debug.internal.core.BreakpointManager.createBreakpoint(BreakpointManager.java:554
at org.eclipse.debug.internal.core.BreakpointManager.loadBreakpoints(BreakpointManager.java:264
at org.eclipse.debug.internal.core.BreakpointManager.initializeBreakpoints(BreakpointManager.java:449)  
at org.eclipse.debug.internal.core.BreakpointManager.getBreakpoints0(BreakpointManager.java:418)    at org.eclipse.debug.internal.core.BreakpointManager.start(BreakpointManager.java:408)  
at org.eclipse.debug.core.DebugPlugin.start(DebugPlugin.java:682)   
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
... Omitted for brevity ...

This error often goes away when I just restart eclipse a few times. I’ve googled for solutions and tried reinstalling eclipse a couple of times. This error only seems to occur if I have both ADT (Android Development Tools) and PDT (PHP Development Tools) + Zend Debugger installed.

Please let me know if you have information about how to solve this problem. On a related note, I never really got the PDT + Zend debugger to work (as in debug) PHP apps on Windows.

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1 Answer

  1. Editorial Team

    This is a workaround instead of a solution, but so far, it’s going good:

    I downloaded and installed Eclipse for PHP Developers(aka Zend Eclipse PDT) version 3.0.2 from Zend website and I’m now able to debug WordPress and Joomla, both pretty complicated projects as far as PHP goes.

    I will update if I experience a problem.

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